Drone at all?The only thing I had to do was adjust one of the rear hangers a little bit to get the tips to level out a bit. My wife couldn't notice it lol. But I did. It only took a $2 hose/worm clamp wrapped around the rubber hanger to adjust the Tip.
No issue at all so far. It's so much enjoyable to drive now and the system can be fairly quiet when you need it to be.